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FJR Motorcycle Forums
Technical & Mechanical Problems
Gas Cap Modification
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<blockquote data-quote="dcarver" data-source="post: 217906" data-attributes="member: 956"><p>I must be missing the big picture... thought that the tank 'vents' via the charcoal filter for Kali bikes, or via the straight-to-atmosphere vent tube for 49 state bikes. I think. If it can vent vapors via that path, then it should also allow atmospheric pressure to reach the top of the tank, above the liquid gas fuel level, thus preventing vacuum/vapor lock?I thought the path from the tank via the orange grommet through the cap was only for overpressurization relief and not for allowing atmospheric pressure to the air portion of the gas tank? e.g. a one way path to relive pressure, not vent the top of the tank? I tried to 'blow' pressure through the cap, and it was sealed tight. More than my lungs could provide. So, if sealed, how would it 'vent' the top, non liquid volume of the tank?</p><p></p><p>I really need to look at mine tomorrow. My feeble cranium scareabelllium is venting excess smoke now.. No wonder I'm not an enJinR. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll eyes :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></p></blockquote><p></p>
[QUOTE="dcarver, post: 217906, member: 956"] I must be missing the big picture... thought that the tank 'vents' via the charcoal filter for Kali bikes, or via the straight-to-atmosphere vent tube for 49 state bikes. I think. If it can vent vapors via that path, then it should also allow atmospheric pressure to reach the top of the tank, above the liquid gas fuel level, thus preventing vacuum/vapor lock?I thought the path from the tank via the orange grommet through the cap was only for overpressurization relief and not for allowing atmospheric pressure to the air portion of the gas tank? e.g. a one way path to relive pressure, not vent the top of the tank? I tried to 'blow' pressure through the cap, and it was sealed tight. More than my lungs could provide. So, if sealed, how would it 'vent' the top, non liquid volume of the tank? I really need to look at mine tomorrow. My feeble cranium scareabelllium is venting excess smoke now.. No wonder I'm not an enJinR. :rolleyes: [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Gas Cap Modification
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